A romantic comedy about a woman Oh Woo Ri, who intended to remain chaste until marriage, accidentally winds up pregnant while undergoing a medical examination.

At a difficult place in his marriage and career, a middle-aged man gets a shot at a do-over when he's transformed back into his 18-year-old body.

A womanizer and a cute woman (in a 10 year relationship going nowhere) on business trip are seated next to each other on a full train from Seoul to Busan. They start talking when she accepts she can't escape him.